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anonymous

  • one year ago

What is the quadratic function that is created with roots -3 and 1 and a vertex at (-1, -8)?

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  1. anonymous
    • one year ago
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    srry roots r the x values rite

  2. anonymous
    • one year ago
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    so we would model this in vertex form

  3. anonymous
    • one year ago
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    lets go over this together

  4. anonymous
    • one year ago
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    ill wait till u reply

  5. anonymous
    • one year ago
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    r u there

  6. anonymous
    • one year ago
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    tsunamiiii reply

  7. anonymous
    • one year ago
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    yes

  8. anonymous
    • one year ago
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    ok so do u remember vertex form.

  9. anonymous
    • one year ago
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    what wud the equation be

  10. anonymous
    • one year ago
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    f (x) = a(x - h)2 + k ?

  11. anonymous
    • one year ago
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    yeah

  12. anonymous
    • one year ago
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    i mean.. y equals a brackets x minus h... etc

  13. anonymous
    • one year ago
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    so it called vertex form for a reason.. (h,k) is the coordinate of the vertex

  14. anonymous
    • one year ago
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    so youd insert that in the equation . y = a(x+1)2 - 8

  15. anonymous
    • one year ago
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    u can insert a coordinate into the equation and solve for a

  16. anonymous
    • one year ago
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    because u already have the (-3,0) and (1,0) , u can sub that into the equation i wrote and solve for the a value

  17. anonymous
    • one year ago
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    so try this: 0 = a(1+1)2 - 8

  18. anonymous
    • one year ago
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    do u understnad so far

  19. anonymous
    • one year ago
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    yes

  20. anonymous
    • one year ago
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    ok tell me what u get as your answer

  21. anonymous
    • one year ago
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    u got it..

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